But his lead-position in the polls was undone last week after a 23-year-old woman, Sydney Leathers, came forward to say she had exchanged risque chats and pictures with Mr Weiner - who used the online alias Carlos Danger.

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The chats occurred after Weiner had resigned from Congress and after he had given interviews about his desire to rebuild his troubled marriage.

Weiner's campaign manager resigned, reportedly because the candidate had lied to him about when the sexting had stopped.

Olivia Nuzzi: called a "slutbag" by Barbara Morgan. Photo: @olivianuzzi

Weiner then dropped from first to fourth in some polls. But the trouble has continued.

On Tuesday, a picture of Weiner-for-Mayor intern Olivia Nuzzi appeared on the front page of the New York Daily News. And in an article that is credited to her, she alleged that a further six staffers had resigned.

Ms Nuzzi further alleged that many of those who worked on the campaign had "short resumes" and primarily joined as a means of getting a job with Hillary Clinton, for whom Weiner's wife works as an aide.

Olivia Nuzzi on the front page of the New York Daily News.

Among those singled out for criticism was the campaign's communications director, Barbara Morgan.

When contacted by the website Talking Points Memo for an interview, Ms Morgan did not hold back:

“I'm dealing with like stupid f---ing interns who make it on to the cover of the Daily News even though they signed [non-disclosure agreements] and/or they proceeded to trash me,” she said. “F---ing slutbag. Nice f---ing glamour shot on the cover of the Daily News. Man, see if you ever get a job in this town again."

Ms Morgan also alleged Ms Nuzzi had only worked on the campaign briefly and often did not show up for work and threatened to sue her.

The communications director later said she had thought the conversation was off the record and apologised in a written statement.

“I used inappropriate language in what I thought was an off-the-record conversation,” she said in a statement. “It was wrong and I am very sorry, which is what I said tonight when I called and emailed Olivia to apologise.”